Slide Preview for B3 Life on Earth

Powerpoint Description:

Use this slideshow to help you teach the B3 module from the 2011 OCR 21st Century course! It covers: definition of a species, competition between species, adaptation to the environment, how the sun's energy enters a food chain through photosynthesis, food chains, food webs, how food webs are affected by a change in population, energy flow and efficiency in a food chain, extinct species, factors that can cause extinction, recycling living organisms, the carbon cycle, decomposers, the nitrogen cycle, measuring environmental changes, pollution indicators, the development of life on Earth, mutations in DNA, natural selection, selective breeding, evolution, evidence for evolution, sharing DNA with other species, Darwin's views compared to those of Lamarck and Weisman, biodiversity, classifying species, protecting endangered species, sustainable development, monoculture crops, recycling and using less materials.